zeroliu/ff_idb.html

## ff_idb.html
<!DOCTYPE html>

<body>
  <script>
    function createDb() {
      return new Promise((resolve, reject) => {
        const openRequest = indexedDB.open("test-idb-ff-error", 1);
        openRequest.addEventListener("success", () => {
          console.log('open succeeded');
          const db = openRequest.result;
          console.log(db.objectStoreNames);
          // This would throw when db is corrupted.
          db.transaction("databases", "readwrite");
          db.addEventListener("versionchange", () => {
            db.close();
          });
          resolve();
        });
        openRequest.addEventListener("upgradeneeded", (evt) => {
          // Interrupt upgrade
          window.location.reload();
          console.log('reload');
          openRequest.result.createObjectStore("databases");
        });
      });
    }

    function reset() {
      return new Promise((resolve, reject) => {
        const request = indexedDB.deleteDatabase("test-idb-ff-error");
        request.addEventListener("success", () => {
          console.log('delete succeeded.');
          resolve();
        });
      });
    }

    async function test() {
      for (let i = 0; i < 1000; ++i) {
        console.log(`iteration ${i}`);
        await createDb();
        await reset();
      }
    }

    test();
  </script>
</body>
	<!DOCTYPE html>

	<body>
	<script>
	function createDb() {
	return new Promise((resolve, reject) => {
	const openRequest = indexedDB.open("test-idb-ff-error", 1);
	openRequest.addEventListener("success", () => {
	console.log('open succeeded');
	const db = openRequest.result;
	console.log(db.objectStoreNames);
	// This would throw when db is corrupted.
	db.transaction("databases", "readwrite");
	db.addEventListener("versionchange", () => {
	db.close();
	});
	resolve();
	});
	openRequest.addEventListener("upgradeneeded", (evt) => {
	// Interrupt upgrade
	window.location.reload();
	console.log('reload');
	openRequest.result.createObjectStore("databases");
	});
	});
	}

	function reset() {
	return new Promise((resolve, reject) => {
	const request = indexedDB.deleteDatabase("test-idb-ff-error");
	request.addEventListener("success", () => {
	console.log('delete succeeded.');
	resolve();
	});
	});
	}

	async function test() {
	for (let i = 0; i < 1000; ++i) {
	console.log(`iteration ${i}`);
	await createDb();
	await reset();
	}
	}

	test();
	</script>
	</body>